Java Utililty Methods ImageIO Usage

List of utility methods to do ImageIO Usage

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Description

The list of methods to do ImageIO Usage are organized into topic(s).

Method

voidcloseEL(ImageInputStream iis)
close EL 
try {
    if (iis != null)
        iis.close();
} catch (Throwable t) {
IIOMetadataNodecreateAsciiField(int number, String name, String val)
create Ascii Field 
IIOMetadataNode field, arrayNode, valueNode;
field = new IIOMetadataNode("TIFFField");
field.setAttribute("number", Integer.toString(number));
field.setAttribute("name", name);
arrayNode = new IIOMetadataNode("TIFFAsciis");
field.appendChild(arrayNode);
valueNode = new IIOMetadataNode("TIFFAscii");
arrayNode.appendChild(valueNode);
...
ImageWriteParamcreateImageWriteParam(ImageWriter writer, float quality)
create Image Write Param 
ImageWriteParam param = writer.getDefaultWriteParam();
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param.setCompressionQuality(quality);
return param;
voidderegisterProvider(final ServiceRegistry registry, final IIOServiceProvider provider, final Class category)
THIS METHOD WILL ME MOVED/RENAMED, DO NOT USE. 
registry.deregisterServiceProvider(category.cast(provider), category);
ImageWriteParamgetParams(ImageWriter writer)
get Params 
ImageWriteParam param = writer.getDefaultWriteParam();
try {
    param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    param.setCompressionQuality(1.0f);
} catch (Throwable ignored) {
return param;
intguessCompressionRatio(final ImageReaderWriterSpi spi)
Guesses the compression ratio for the given image format. 
if (spi != null) {
    for (final String format : spi.getFormatNames()) {
        if (format.equalsIgnoreCase("png")) {
            return 4;
        if (format.equalsIgnoreCase("jpeg")) {
            return 8;
        if (format.equalsIgnoreCase("tiff")) {
            return 1;
        if (format.equalsIgnoreCase("bmp") || format.equalsIgnoreCase("raw")) {
            return 1;
return 0;
TlookupProviderByName(final ServiceRegistry registry, final String providerClassName)
THIS METHOD WILL ME MOVED/RENAMED, DO NOT USE. 
try {
    return (T) registry.getServiceProviderByClass(Class.forName(providerClassName));
} catch (ClassNotFoundException ignore) {
    return null;
voidsetCompressionQuality(ImageWriteParam params, int quality)
set Compression Quality 
if (quality <= 0) {
    quality = 1;
if (quality > 100) {
    quality = 100;
try {
    params.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
...